Chapter 3: The Cellular Level of Organization REVIEW QUESTIONS
A mutation in the gene for a cyclin protein might result in which of the following?
-A cell with additional/less geentic material than normal. -Cancer
How many "letters" of an RNA molecule, in sequence, does it take to provide the code for a single amino acid?
3
The nucleus and mitochondria share which of the following features?
A double cell membrane.
Which of the following is part of the elongation step of DNA synthesis?
Attaching complementary nucleotides to the template strand.
What sequence on a DNA molecule would be complementary to GCTTATAT?
CGAATATA
What multipotent stem cells from children sometimes banked by parents?
Cells from the umbilical cord and the baby teeth.
Which of the following is not a difference between DNA and RNA?
DNA contains alternating sugar-phosphate molecules while RNAs do not contain sugar.
Place the following structures in order from least to most complex organization: chromatin, nucleosome, DNA, chromosome.
DNA, Nucleosome, Chromatin, Chromosome.
Which of the following phases is characterized by preparation for DNA synthesis?
G1
Which type of stem cell gives rise to red and white blood cells?
Hematopoietic.
Because they are embedded within the membrane, ion channels are examples of ________.
Integral Proteins.
Which of the following organelles produce large quantities of ATP when both glucose and oxygen are available to the cell?
Mitochondria.
Arrange the following terms in order of increasing specialization: oligopotency, pleuripotency, unipotency, multipotency.
Pleuripotency, multipotency, oligopotency, unipotency.
Which of the following is a function of the rough ER?
Production of proteins.
What structure could be found within the nucleolus?
Ribosomes
The rough ER has its name due to what associated structures?
Ribosomes.
What is a primary function of tumor suppressor genes?
Stop certain cells from dividing.
Which of the following is not made out of RNA?
The intron.
Which of the following is a feature common to all three components of the cytoskeleton?
They are all polymers of protein subunits.
ion pumps and phagocytes are both examples of ______.
active transport.
The diffusion of substances within a solution tends to move those substances _____ their ______ gradient.
down; concentration
Transcription and translation take place in the ________ and ________, respectively.
nucleus; cytoplasm.
Diffusion is to ____ as endocytosis it to _______.
osmosis; pinocytosis.
Cytoplasm is to cytosol as a swimming pool containing chlorine and flotation toys is to ________.
water.